Modern GT & LMP: ~1.8bar front and rear. Maybe down to 1.6bar for a very slow track like Long Beach or higher to 1.90-1.95bar at Le Mans to squeeze a little bit more off the rolling resistance.

Touring cars & V8 Supercar: 2.0-2.15bar front and rear

Ford Fusion: 2.4-2.6bar front and rear for road courses. Ovals might go to 3.0bar+ (45-50psi) on the right side

Light sportscars (Radical, BAC, KTM, etc): ~1.6bar (24psi)

Road car tires: All in the 2.1-2.2bar (29-32psi) range hot. Any MotorTrend readers will know how much they stop every few laps and bleed pressure to hold that target during the BDC tests.

Vintage GT: Roughly the same range as modern GT

Vintage Group 6 & Formula: Bit more flexible here. Something in the 1.7bar (25psi) range is usually a good starting point up to 2.0bar (29psi) or down to 1.2bar (17psi) to adjust for balance on something wild like the Lotus 72D